DOMAINS-BASED SNAPSHOTS FOR EFFICIENT MEMBERSHIP RETRIEVAL AND GOVERNANCE

摘要

The described technology is generally directed towards domains-based snapshots, where domains represent groups of files in a global filesystem namespace, and snapshots are point-in-time representations of parts of the filesystem. A snapshot data service creates a domain, e.g., for a particular directory and its files, retrieves that domain membership and uses the domain membership information to determine a snapshot-related operation, such as whether to copy-on-write a file. The domain membership information can also be used to determine the copy-on-write range of relevant snapshot identifiers, that is, which set of snapshots govern a given file or directory.